[dpdk-dev] [PATCH] eal: store control thread CPU affinity in TLS

[<jerinj@marvell.com>]

From: Jerin Jacob <jerinj@marvell.com>

_cpuset TLS variable stores the CPU affinity of eal thread.
Populate the _cpuset TLS variable for control thread to

1) Make rte_thread_get_affinity() and eal_thread_dump_affinity
functional with control thread.
2) Quick access to cpu affinity.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
---
 lib/librte_eal/common/eal_common_thread.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c
index 78581753c..99fe1aa4e 100644
--- a/lib/librte_eal/common/eal_common_thread.c
+++ b/lib/librte_eal/common/eal_common_thread.c
@@ -152,10 +152,14 @@ struct rte_thread_ctrl_params {
 static void *rte_thread_init(void *arg)
 {
 	int ret;
+	rte_cpuset_t *cpuset = &internal_config.ctrl_cpuset;
 	struct rte_thread_ctrl_params *params = arg;
 	void *(*start_routine)(void *) = params->start_routine;
 	void *routine_arg = params->arg;
 
+	/* Store cpuset in TLS for quick access */
+	memmove(&RTE_PER_LCORE(_cpuset), cpuset, sizeof(rte_cpuset_t));
+
 	ret = pthread_barrier_wait(&params->configured);
 	if (ret == PTHREAD_BARRIER_SERIAL_THREAD) {
 		pthread_barrier_destroy(&params->configured);
-- 
2.24.1